曲线梁桥恒载作用下的简化计算

曲线梁桥(又称弯桥)已成为现代交通工程中的一种重要桥型。曲线梁在恒载作用下会产生弯曲和扭转,如果通过空间杆系法来解决其计算问题,需要较多时间和精力。通过比较恒载作用下曲线梁桥的内力、应力及支座反力与同跨径直线桥梁的计算结果,得出曲线桥梁的简化计算方法。对于箱形截面、恒载作用下曲线梁桥的内力、应力可采用同跨径的直线桥计算结果,曲线梁桥的支反力可依据直线桥计算结果来估算一定条件下的曲线梁桥支反力。

Simplified Calculation of Curve Beam Bridge under Constant Load

The curve beam bridge (also called as the curved bridge) has become an important bridge type in the modern transport engineering. The curve beam will produce a curve and torsion under the constant load. Its calculation to be solved is required more time and more energy by space truss system method if required. Through the comparison of internal force, stress and support counterforce of curve beam bridge with the calculation result of the same-span straight-line bridge, the article gives the simplified calculation method of curve beam bridge. The internal force and stress of curve beam bridge can be calculated by the calculation result of straight-line bridge under the box section and constant load, and the support counterforce of curve beam bridge can be estimated by the calculation result of straight-line bridge under a certain condition.